hello world
<script type="text/javascript">  
thisURL = document.URL;  
strwrite = 
"<img src='https://chart.googleapis.com/chart?cht=qr&chs=150x150&choe=UTF-8&chld=L|4&chl="
 + thisURL + "' width='150' height='150' alt='code' />"; 
document.write( strwrite );  
</script> 